Wood-barking apparatus.



G. SPAAK.. I WOOD BARKING APPARATUS. APPLICATION FILED APR. 6, 1908.

944,290, Patented De0.28, 1909.

4 SHEETS-SHEET 1.

G. SPAAK. WOOD BARKING APPARATUS.

APPLICATION FILED APR. 6, 190B.

Patented Dec. 28, 1909.

4 SHEETS-SHEET 2.

G. SPAAK.

WOOD BARKING APPARATUS.

APPLIOATION FILED APR. 6, 1908.

Patented Dec. 28,1909.

4 SHEETS-SHEET 3.

G. SPAAK.

. WOOD BARKING APPARATUS.

APPLICATION FILED APR. 6, 1908.

Patented Dec. 28, 1909.

4 SHEETS-SQEET 4.

GEORGE SPAAK, OF BERGVIlK, SWEDEN.

WOOD-BARKING APPARATUS.

Specification of Letters Patent.

Patented Dec. 28, 1909.

Application filed April 6, 1908. Serial No. 425,515.

To all whom it may concern:

Be it known that I, GEORGE SPAAK, a subject of the King of Sweden, andresident of Bergvik, in the Kingdom of Sweden, have invented certain newand useful Improvements in Wood-Barking Apparatus, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to a machine for barking timber and moreespecially to the barking of timber employed in the manufacture of paer.

In the mac line comprising this invention the barking of the timber 1seffected by a series of cutters,'all of which are stationar relativelyto the log or timber which 1s caused to move through the apparatus bysuitable means employed for this purpose.

In carrying out the invention, the cutters are preferably mounted at thesame distance from each other around a circular space through which thelogs are caused to pass. The said cutters are mounted u on shafts whichare adjustable longitudinal y and also capable of moving with apendulum-like motion so that the positions of the cutters may be variedautomatically by the size of the log passing through the apparatus; thisautomatic action being re ulated by the adjustability of the devlces orreceiving, supporting and feeding the logs, as will be hereinafter moreparticularly described.

In the accompanying drawings, Figure 1 is an end elevation and partialsection of the apparatus embodying my present invention. Fig. 2 is aside elevation. Fig. 3 is a plan. Fig. 4 is a longitudinal section on anenlarged scale of the bearings for the cutter shaft. Fig. 5 is a sideelevation and partial section of the parts employed to adjust thetension and determine the osition of the cutter members. Figs. 6 an 7respectively are a plan and side elevation of the same. Fig. 8 is asection through the disks c a. Fig. 9 is a central vertical sectiontaken through the hollow arm 3. Fi 10 is a central longitudinal sectiontaken throughthe hollow shaft 4 and Fig. 11 is atransverse section takenthrough the revoluble disks 3 and associated parts.

Referring particularly to the drawing, the

parts of the apparatus employed for receiving, supporting and feedingthe log during the barking operation preferably comprise a plurality ofpairs of conical, fluted disks indicated at 1, 1, the sides of smallerdiameter, each of which is arranged to abut'against the outer surface ofthe hollow arm 3 1n whicheach pair of disks 1 is mounted upon,

is supported by the bearings 6 provided in the uprights 7 of the frameof the apparatus.

Through each of the hollow shafts 4 there extends a shaft 8 which also1passes through the trunnions 5 and is journa ed therein. A chain gear ais em loyedwithin each of the hollow shafts 4 an each chain a passesover a chain-wheel b on the shaft 8 and a similar chain-wheel c on theshaft 2 within the hollow arm 3, and by means of which the shaft 2 anddisks 1 thereon are revolved from the shaft 8 and which latter is turnedby any suitable motor.

As will be apparent from Fig. 2, the hollow shafts 4 are mounted oneabove the other in pairs at opposite ends of the apparatus and the disks1 in pairs are correspondingly arranged to lie one above the other, andconnected to the hollow shafts 4 are segmental gears indicated at 9; thegear 9 on one shaft 4 meshing with the segmental gear 9 on the otherhollow shaft 4 of each pair of hollow shafts so that the hollow arm 3and the disks.

l of each pair will always maintain a like distance from the center ofthe log passing through the apparatus It will be understood that theshafts 8 may be driven as hereinbefore stated by any suitable mechanism,the speed of which may be varied to meet the requirements of the speedthat it is desired to impart to the log in passing throughthe apparatus.1 I also employ a plurality of cutters indicated at 10 and each of whichis provided with a series of teeth indicated at d; it being understoodhowever, that the particular form of cutter comprises nofeature of mypresent invention inasmuch as any desired type of cutter may beemployed. Preferably there is a series of cutters arranged on both sidesof the main frame 17 of the apparatus, the cuttters of each of theseseries being mounted as hereinafter described, to assume a circularrelationship in order that the entire sur-v face of the log may beoperated upon, and v the alternate cutters in each series thereof arepreferably arranged in different planes so as to bring the cutters asclosely to ether as possible. Each cutter 10 is secure to a shaft 11which latter is journaled in a sleeve 12 connected to the outer end ofwhich is an electric or other motor indicated diagrammatically at 13.The sleeve 12 is mounted in any suitable guide preferably a'sleeveindicated at 14, and the sleeve 14 is provided in a suitable positionwith trunnions 15 adapted to fit into bearings 16 secured in the mainframe 17 so that the cutter shaft may be turned or oscillated upon thetrunnions 15 with a movement similar to that of a pendulum. Each sleeve12 is made adjustable relatively to the bearing 16 at a point 20 bymeans of a sprin -link 19 :which may be moved longitudina ly todetermine the position of the sleeve 12 and consequently that of theshaft 11, and this spring-link member 19 may be secured in the positionin which it is set by means of the screw-bolts e or otherwise. i

' As will be apparent particularly from Fig. 4 of the drawing, eachcutter together with its shaft, the sleeves 12 and 14, the motor forturning the shaft 11 and the s ring- I link 19 form a unitary structurewhic may be termed a barker member. I r

a The main frame 17 preferably has the shape of a wide ring which isU-shaped in cross section, with the opening between the members of theU-shaped frame facing the center of the rin Now in the barkingoperation, the 10 is fed through the ring by the disks '1 an the bark isremoved by the cutter members, each set of which is divided into twoplanes as hereinbefore indicated and as shown in Fig. 2, so that thecutters may be located as closely as possible to each other when the logto be operated upon is of a small diameter.

As hereinbefore stated, each cutter member may be oscillated on thetrunnions 15 and moved longitudinally by sliding the sleeve 12 withinthe sleeve 14. The length 'of the sliding movement or longitudinaladjustment is evidently dependent upon the distance between theconnecting point of the spring-link 19 with the sleeve 12 and the point20, which distance must be so adjusted that the medium rotary plane ofthe cutter for all positions of the same, passes approximately throughthe center line of the log; this feature being of special importance inreducing the loss of wood to a minimum during the barking operation.

On each side ofthe main frame 17 I employ a rotatable ring. These ringsare inicated respectively at 21 22, and are pref erably concentric withthe frame and supported upon rollers 17 which latter are mounted 1n thesaid frame, and on each of the said rings is provided an arm 23 24 re-'is adapted to pass into and operate within a slot in the extremity ofthe central arm 29 of a three-armed lever; the other -arms 30 of whichlever are connected respectively with the hollow shafts 4 4 at theopposite ends of the apparatus by links 31 and the arms 32, which latterextend upwardly from the said holloyv shafts 4. i

For the sake of clearness the parts indicated by 27 to 32 inclusive, areillustrated on an enlarged scale in Figs. 5, 6 and 7. The lever whosearms are 'ndicatedby 29 and 30 is pivotally connected to the frame 17 asindicated at 28, and the'rings 21 22 are yieldingly connected by coilsprings 27 with the spring-links 19 of each of the barker 35 members sothat by the said ring and lever mechanism, all the cutters. aresubstantially tubes 35 and 36 by the action of the said fan.

For the sake of clearness but one cutter has been shown in Fig. 1 andbut one of each series of cutters hasbeen shown in Fig. 2.

The essential feature of the invention it is believed will be fullyunderstood from the drawing and description without further 1illustration; the essential feature consisting in the peculiar positionin which the cutter shafts are placed with relation to the log inpassing through the apparatus and in the possibility of moving thecutters and their shafts longitudinally and at the same time'-transversely of the log to automatically adjust the same to thedifferent sized logs. 7

In the operation of the hereinbefore described wood-barking apparatus,the logs from which the bark is to be removed are first "passed into themachine between the fluted disks indicated at 1 which latter by theconstruction hereinbefore described, are automatically adjusted to therequired posi-- tion to bear against the opposite surfaces of the log,whereupon the shafts 8 are turned by any suitable power to drive thedisks 1 by means of the chain-gears a. Likewise the motors 13 arestarted, which as will be understood, revolvethe cutting tools which areautomatically maintained against the positions required for 115 dled bythe blower ap 1' by the surface of the log intermediate of the disksconstruction as hereinbefore described. The cutting tools are of such anature and are so arranged as to extend entirely around the log, therebyremoving substantially all the bark therefrom which is chopped up intocomparatively small particles, so small in fact as to be readilyhanaratu which draws the chi )s of bark from icneath the frame 17througi the diverging tubes 37 to the common discharge tube 36, thence.away to any suitable place of deposit.

I claim as my invention:

1. In a wood-barking machine and in combination, a frame, a plurality ofcutters, a

shaft upon which. each cutter is mounted, means whereby each cuttershaft is so mounted in the said frame as to be longitudinally adjustableand movable transversely of the path of a log to be barked, and meansfor receiving, supporting and feeding a log durin the arkin o eration.-

2. fit a wood-bar ing machine and in combination, a frame, a pluralityof circularly disposed cutters, a shaft for each cutter, means forrotating each cutter shaft, means whereby each cutter shaft is somounted in the said frame as to be longitudinally adjustable and movabletransversely of the path of a log in the machine, and means forreceiving, supporting and feeding a log through the machine.

3. In a wood-bark ng machine and in combination, a frame, means forreceiving, supporting and feeding a log to be barke a plurality ofcutters circularly disposed around the periphery of the log, a shaft foreach cutter, a sleeve in which the said shaft is journaled, a secondsleeve in which the aforesaid sleeve is longitudinally adjustable andmeans whereby the said second sleeve is pivotally mounted in the saidframe so that the cutter shaft and cutter may swing toward .=-and awayfrom the log in the barking operation.

4. In ,a wood-barking machine and in combination, a frame, means forreceiving, supporting and feeding a log through the machine, a )luralityof cutters circularly disposed around the periphery of the log, a shaftfor each cutter, a sleeve in which the said shaft is journaled, a motorsecured to the said sleeve and connected to the said shaft, a secondsleeve in which the aforesaid sleeve and its cutter shaft arelongitudinally adjustable, means for determining and securing theaforesaid sleeve in position in the said second sleeve and means wherebythe said second sleeve is pivotally mounted in the said frame so thatthe same together with the. first aforesaid sleeve, the cutter shaft andits cutter may be given a swinging movement transversely of thelog.

5. In a wood-bar ing machine and in combination, a frame, means forreceiving, supporting and feeding a log through the machine, a pluralityof cutters circularly disposed around the periphery of the log, a shaftfor each cutter, a sleeve in which the said shaft is journaled,a motorsecured to the said sleeve and connected to the said shaft, a secondsleeve in which the aforesaid sleeve and its cutter shaft arelongitudinally adjustable, an adjustable spring-link between the cuttershaft and the frame for uiding the said cutter shaft, means whereby thesaid second sleeve is pivotally mounted in the said frame so that thesame together withthe first aforesaid sleeve, the cutter shaft and itscutter ma be given a swinging movement transverse y of the log, andmeans for forcing the said cutters against the peri hery o the log.

6. In a woo -bark1ng machine and in means for receiving,

combination, a frame,

a log through the supporting and feeding machine, a plurality o cutters,a shaft for each cutter, means for so mounting each cutter shaft and itscutter in the said frame that the said cutter shaft and its cutter aread'ustable longitudinally and are also movable laterally of the log,means for maintainin the said cutters against the periphery o the logand means controlled by the aforesaid means for receivin supporting andfeeding alog for adjusta 1y determining the tension under which the lastaforesaid means operate.

7. In a wood-barking machine and in combination, a frame, means forreceiving, supporting and feedin ,a log through the machine, a pluralityof cutters, a shaft for each cutter, means for so mounting each cuttershaft and its cutter in the said frame that the said'cutter shaft andits cutter are ad'ustable longitudinally and'are also movable laterallyof the log, a rin revolubly mounted in said frame, a plurality ofsprings each connecting one of the means in which a cutter shaft ismounted with the said ring, and means controlled by the said means forreceiving, supporting and feeding a log for swinging the said ring tovary the tension under which the said springs act upon the said cuttershafts.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

. GEORGE SPAAK. Witnesses HJALMAR ZE'ITERSTROM,

Ronun'r APELGREN.

